I've never lived anywhere other than the South, and I can tell you I
never had homemade potato salad with mustard in it. It was potatoes,
celery, mayo, hard boiled eggs, some dill or paprika, s&p.
Some would add some grated onion, dill pickles or sweet pickles, and
maybe some vinegar.......but, I never had the bright yellow stuff they
pass off as potato salad growing up.

I have German friends, and their potato salad is nothing like ours. It
has no mayo, has tomatoes and squeezed out salted, drained cukes and
bacon. I think it did have mustard in it and sour cream, It was
distasteful to me, and I ate it only to be polite. It was always served
room temp.

Libby